Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer...

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Transcript of Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer...

Page 1: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –
Page 2: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

Compact Heat Exchangers

MicroHeatBrazed Plate Heat

Exchanger

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Brazed Heat Exchangers

GB

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How it works!

Page 5: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

How it works!

High turbulenceTrue counter current flow pathLow foulingHighest heat transfer coefficients

Page 6: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

High Efficiency

Surface Area = QU x LMTD

Q = Heat transfer dutyU = Overall heat transfer coefficientLMTD = Log mean temperature difference

= ( Thot in – Tcold out ) – ( Thot out – Tcold in )ln ( Thot in – Tcold out )

( Thot out – Tcold in )

Page 7: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

Heat Transfer Coeffecients

Application Shell & Tube PlateWater / water 250 1500Steam / water 350 1500SAE 30 Oil / water 60 150#6 Fuel Oil / water 20 5050% E.G. / water 150 1000

Page 8: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

Counter Current Flow

LMTD

PRICE

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BPHE Benefits

HIGH HEAT TRANSFER

COEFFICIENTS

LOWERVOLUME

LESSMATERIAL

COMPACTDESIGN

LOWESTINSTALLEDCOST!

Page 10: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

BPHE Benefits

COUNTER CURRENT

FLOW

TEMPERATURECROSSING

LOWER ENERGYCOSTS!

GREATERHEATRECOVERY

CLOSERAPPROACHTEMPERATURE

Page 11: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

BPHE Components

Page 12: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

BPHE Benefits

ALL STANDARD

COMPONENTS

LOWERCOSTS!!

LOWERCOSTS!!

LOWERCOSTS!!

LOWERCOSTS!!

Page 13: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

The Plates

Page 14: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

The Plates

Materials- 316SS

Plate Patterns- H ( High-theta plate )

Plate Thicknesses- 0.4,0.3 mm

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The Brazing

Page 16: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

The Brazing

Materials- Copper- Nickel

Models: GBN30,GBN50,GBN105

Page 17: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

The Connections

Page 18: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

The Connections

Soldered- ½” to 1-5/8”

Threaded - External- ½” to 3”

Threaded - Internal- ½” to 2-1/2”

Note: Connection size &availabilitydependent on the unit size

Page 19: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

The Complete BPHE

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Certification

ModelMax. AllowablePressure (PSI)

Test Pressure(PSI)

Working TemperatureRange (degF)

GB30,GB50,GB70,GB95,GB105,GB205

435 623.5 -256 to 392

GB210 232 333.5 -256 to 392

Note: 1) Ratings for copper braze

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Certification

UL for refrigeration units

ISO 9002 Quality Program

Page 22: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

Delivery

Stock four sizes in ten plate increments with MNPT connections (GB30,GB50,GB105,GB210)Stock evaporators and condensers up to 10 tons

Page 23: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

Installation

Mounting suggestions: There are four different ways to mount the GB;(a) Bottom support(b) Sheet metal bracket (c) Crossbar & bolts (d) Stud bolts

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Applications

Oil coolingEnergy recoveryChillersSnow melt systemsTemperature control packages

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Graham Advantage

Quality DrivenCustomer ServiceProven Track RecordProprietary KnowledgeEngineering Strength

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Dry Vacuum Pump

Steam Jet Ejectors

Liquid Ring Pump System

Turbine Exhaust Condenser

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Heliflow Heat Exchanger

Plate & Frame Heat Exchanger

Instantaneous Hot Water Heater

Multimedia Presentation “Vacworks”

Steam Generator

Page 28: Compact Heat Exchangers - Wesmech Tech€¦ · Q = Heat transfer duty. U= Overall heat transfer coefficient. LMTD = Log mean temperature difference = ( T hot in –T cold out) –

THE END


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